Difference between revisions of "Mattione Update 11072011"

From GlueXWiki
Jump to: navigation, search
(Problems)
(Problems)
Line 37: Line 37:
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
  
 +
[[Image:Mattione_Update_11072011_BCALPiPlusSigmaTNoSmear_SingleBin.gif|thumb|left|600px]]
 +
<br style="clear:both;"/>
 +
 +
<!--
 
=== Reference ===
 
=== Reference ===
 
* Fit the results of David's study: Fit  &gamma; BCAL &sigma;<sub>t_1234</sub> / &sigma;<sub>t_334</sub> vs. &theta; in dE bins:
 
* Fit the results of David's study: Fit  &gamma; BCAL &sigma;<sub>t_1234</sub> / &sigma;<sub>t_334</sub> vs. &theta; in dE bins:
Line 42: Line 46:
 
[[Image:Mattione_Update_10312011_BCALPhotonTimeResolutionRatio_Fits1.gif|thumb|left|300px]]
 
[[Image:Mattione_Update_10312011_BCALPhotonTimeResolutionRatio_Fits1.gif|thumb|left|300px]]
 
<br style="clear:both;"/>
 
<br style="clear:both;"/>
 +
-->

Revision as of 13:01, 7 November 2011

Procedure

  • Reconstruct π(1600) -> b1π events with t-slope = 2.0 using both the 334 and 1234 segmentations
  • Plot Δβ vs p for π+ candidates to see proton, π+ separation.

π(1600) -> b1pi Events

p vs. θ

  • p vs. θ
    • NOTE: time improvement only at forward angles, so will be negligible for protons in this reaction.
π+'s
protons

π+ BCAL Δβ vs p

Δβ = βp - βt = p/sqrt(p*p + m*m) - path/(c*TOF)

334 Segmentation


  • π(1600) -> b1pi Events, π+ Candidates, BCAL Δβ vs p, 334 Segmentation
p = 1.2 GeV/c, 334 Segmentation
p = 1.4 GeV/c, 334 Segmentation
p = 1.5 GeV/c, 334 Segmentation
p = 1.6 GeV/c, 334 Segmentation

Problems

  • π+ Reconstructed BCAL Time Resolution
    • NOTE: For 1234 Scheme: the shower time was smeared by: σsmear = sqrt(σ2t_1234_Target - σ2t_334_NoSmear), where σt_1234_Target = σt_334*Improvement_Ratio, Improvement_Ratio = σt_1234 / σt_334
Mattione Update 11072011 BCALPiPlusSigmaTCompare Bin1.gif


Mattione Update 11072011 BCALPiPlusSigmaTNoSmear SingleBin.gif